Zinc(II) and Cadmium(II) complexes with N4-coordinate pyrazole based ligand: Syntheses, characterization and structure

•Synthesis and characterization of nine mononuclear Zn(II) and Cd(II) complexes with ligand dbdmp and pseudohalides.•Synthesis and characterization of two binuclear cadmium(II) complexes with N3− ion.•Structures of [Zn(N3)(dbdmp)]ClO4 and [Cd(NCO)(dbdmp)]ClO4 complexes with tbp geometry.•Structure of [{Cd(dbdmp)}2(μ-N3)2](ClO4)2 and [Cd(NCS)2(dbdmp)] with octahedral geometry.

A series of six new mononuclear zinc(II) complexes of the type [Zn(X)(dbdmp)]Y (1–6) (X = N3−/NCO−/NCS−, Y = ClO4−/PF6−, and dbdmp = N,N-diethyl-N′,N′-bis((3,5-dimethyl-1H-pyrazol-1-yl)methyl)ethane-1,2-diamine), two binuclear cadmium(II) complexes [{Cd(dbdmp)}2(μ-N3)2](Y)2 (7–8) and three mononuclear cadmium(II) complexes [Cd(NCO)(dbdmp)]Y (Y = ClO4−/PF6−) (9–10) and [Cd(NCS)2(dbdmp)] (11) have been synthesized and characterized by physico-chemical methods. Crystal structures of the complexes [Zn(N3)(dbdmp)]ClO4 (1), [{Cd(dbdmp)}2(μ-N3)2](ClO4)2 (7), [Cd(NCO)(dbdmp)]ClO4 (9) and [Cd(NCS)2(dbdmp)] (11) have been solved by single crystal X-ray diffraction studies and showed that [Zn(N3)(dbdmp)]ClO4 (1) and [Cd(NCO)(dbdmp)]ClO4 (9) have distorted trigonal bipyramidal geometry, [Cd(NCS)2(dbdmp)] (11) and [(dbdmp)Cd(μ-N3)]2(ClO4)2 (7) have distorted octahedral geometry.

Graphical abstractA series of nine new mononuclear zinc(II) and cadmium(II) complexes and two binuclear cadmium(II) complexes have been synthesized by using ligand dbdmp and pseudohalogens and characterized by physico-chemical methods. Crystal structures of the complexes [Zn(N3)(dbdmp)]ClO4 (1), [{Cd(dbdmp)}2(μ-N3)2](ClO4)2 (7), [Cd(NCO)(dbdmp)]ClO4 (9) and [Cd(NCS)2(dbdmp)] (11) have been solved by single crystal X-ray diffraction studies.Figure optionsDownload full-size imageDownload as PowerPoint slide